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fs/ntfs3: Fix missing i_op in ntfs_read_mft

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commit 37a530bfe56ca9a0d3129598803f2794c7428aae upstream.

There is null pointer dereference because i_op == NULL.
The bug happens because we don't initialize i_op for records in $Extend.
Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block")

Reported-by: Liangbin Lian <jjm2473@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Konstantin Komarov 2022-05-26 12:51:03 +03:00 committed by Greg Kroah-Hartman
parent efdcf4df7a
commit c293e8abc0
1 changed files with 1 additions and 0 deletions
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fs/ntfs3/inode.c
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@ -430,6 +430,7 @@ end_enum:
} else if (fname && fname->home.low == cpu_to_le32(MFT_REC_EXTEND) &&
fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) {
/* Records in $Extend are not a files or general directories. */
inode->i_op = &ntfs_file_inode_operations;
} else {
err = -EINVAL;
goto out;